Finally measuring time! 8 FTWs and 2 Mal 21s. Need help - Page 5 - AVS Forum
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post #121 of 128 Old 03-06-2013, 02:01 PM
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Quote:
Originally Posted by Scott Simonian View Post

Oh.... Yeah, that would be pretty loud with ten 21's.

Like JapanDave, most people in fact prefer a boost below 20hz.

I'm not worried about the loudness, just curious if he has enough headroom left to make the graph flatter into single digits region.
I can't see why it "wouldn't" be possible; which is why I find it so puzzling that it isn't already with that much boost.

Maybe instead of bringing the low end up, he could instead reduce the 20-70hz region so that it is perfectly flat.
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post #122 of 128 Old 03-06-2013, 03:17 PM
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...or even downward sloping.

as foh mentioned, having the sub in the front wall and at the bottom place them right at the maximum pressure point for room resonances, i.e. they will maximally excite room resonances. eq can usually fix a seat, or if you are lucky an average across seats, but if you are not lucky, then absorption of some form to soak up the resonant energy is a good plan.

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post #123 of 128 Old 03-06-2013, 06:12 PM - Thread Starter
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Quote:
Originally Posted by BassThatHz View Post

Like JapanDave, most people in fact prefer a boost below 20hz.

I'm not worried about the loudness, just curious if he has enough headroom left to make the graph flatter into single digits region.
I can't see why it "wouldn't" be possible; which is why I find it so puzzling that it isn't already with that much boost.

Maybe instead of bringing the low end up, he could instead reduce the 20-70hz region so that it is perfectly flat.

I can't bring it down just by using peak eq function. Any suggestion on how to bring it down other than just lowering certain frequencies? Will adding a low shelve at say 80-90hz and cutting it work and then add another shelve down low where it drops and boost that one?
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post #124 of 128 Old 03-06-2013, 07:30 PM
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Sure.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #125 of 128 Old 03-06-2013, 10:41 PM - Thread Starter
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OK, I think I'm about as close as going to get. This one is cutting 37hz -12db and boosting low end heavy. Its taking a lot of boost down low both cutting down 37 almost to max and cutting 37 a lot but raising everything else to match so think I'll just go with which one sounds best. This one has more cuts then any of the others but also has boosts at 10 and 15hz. Looks good to me but going to have to turn up the gains on everything most likely.


Wellllll,.....,,,,.... I dont have any of the tool buttons to link pictures when posting or editing. This is my best graph and am quite proud to be honest and cant even show it off LOL.
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post #126 of 128 Old 03-06-2013, 10:51 PM - Thread Starter
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cutlowshelve6.jpg
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post #127 of 128 Old 03-06-2013, 11:17 PM
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My Dual 18" LLT subs 120dB down to 10hz

 

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post #128 of 128 Old 03-06-2013, 11:38 PM - Thread Starter
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Well, its not as loud unless really really crank the gain on a bunch of gains throughout the system and I have that freakin hum that I have just tracked down. It appears now only through one clone amp no matter what wires are used. I unhooked all the cables from one clone that didnt have the hum and switched them out to the other. Resulted in same amp with a hum while the other one that got the other cables stayed quiet. The noise floor with the hums gone now looks correct. Its something to do with the clone. I switched power outlets too with no luck. Any ideas?

I have them stacked in the rack without a gap and the one on top has the hum. I have the mini dsp in the rack without a space between it on top of the one with a hum. I have no idea why the hum went away with the QSC amps to the LCRS I was just messing with wires trying to track it down and it went away everywhere except on the on clone.
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